Answer:
8 KJ/ s
Explanation:
Heat pumps Transfer thermal energy through absorbing of heat that comes from cold region and then release to warmer area by utilizing external power.
The coefficient of performance known as COP provide the ratio of both heating and cooling that are supplied to required work.
✓QH=The rate at which heat is produced = ?
✓COP= Coefficient of performance of a residential heat pump = 1.6
✓ W(in)= power consumption= 5KW
QH=The rate at which heat is produced=[Coefficient of performance of a residential heat pump] × [power consumption]
= 1.6 × 5KW
=8 KJ/ s
Answer:
the acceleration of object is 3m/1s
Answer:
B) 3.50 m/s
Explanation:
The linear velocity in a circular motion is defined as:
The angular frequency (
) is defined as 2π times the frequency and r is the radius, that is, the distance from the center of the circular motion.
Replacing (2) in (1):
We have to convert the frequency to Hz:
Finally, we calculate how fast is the child moving:
Answer:
Yes, the car has acceleration.
Explanation:
Acceleration is defined as the rate of change of velocity. The velocity is a vector quantity. If a car is moving with constant speed but taking a turn, it means the velocity is changing, so the car have some acceleration.
